Defensive
If you don’t really have any friends and you do not know why you may want to take a look in the mirror. We know this can sound harsh, but perhaps there is something about your attitude that is pushing people away from you. We are trying to help you out, don’t get mad at us for saying it.
People who are defensive or always correcting others can be a drag to hang out with, so make sure you are not that person. It is okay to point out errors with other people if you are trying to be constructive. But anything else can just push people away from you and cause friction.